package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

//切面
@Aspect
@Component
@Slf4j
public class AutoFileAspect {
    /**
     * 切入点
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointcut(){}
    @Before("autoFillPointcut()")
    public void autoFill(JoinPoint joinPoint){
        log.info("执行自动填充");
        //获取当前被拦截方法操作数据库的类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();//获取方法签名对象
        AutoFill annotation = signature.getMethod().getAnnotation(AutoFill.class);//获取方法注解对象
        OperationType value = annotation.value();
        Object[] args = joinPoint.getArgs();
        if (args==null || args.length==0){
            return;
        }
        Object arg = args[0];
        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();
        if(value==OperationType.INSERT){
            try {
            Method setCreateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
            Method setCreateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
            Method setUpdateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
            Method setUpdateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
            setUpdateUser.invoke(arg, currentId);
            setUpdateTime.invoke(arg, now);
            setCreateTime.invoke(arg, now);
            setCreateUser.invoke(arg, currentId);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }else if(value==OperationType.UPDATE){
            try {
                Method setUpdateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setUpdateUser.invoke(arg, currentId);
                setUpdateTime.invoke(arg, now);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
    }

}
